Wednesday, December 7, 2011

A magnet is an object that has a magnetic field. A magnetic field is basically a field where unlike poles attract each other and like poles repel each other. A magnet has two ends: a North end and a South end. The end that points north is called the north pole of the magnet and the end that points south is called the south pole of the magnet.

Magnets attract metallic objects like pieces of iron and steel.

Magnets can be grouped into permanent magnets and temporary magnets

Permanent magnet

A permanent magnet is the most common type of magnet. You probably have a permanent magnet at home. A fridge magnet is an example of a permanent magnet. A permanent magnet keeps its magnetism for a long time. It is a very strong magnet.Permanent magnets can be made into all sorts of different shapes and sizes. They can be made into horseshoes, donuts, rings, rectangles and round bars.

How its made magnets?

Lets watch it!!!!!!!

Handling Magnets The Proper WaysMagnets can lose their magnetism or strength if we knock them, drop them or heat them. Thus, magnets must be handled with care to preserve their strength. The strength of the magnets can be preserved by storing the magnets with iron keeper or magnet keeper. Placing keepers at the poles of the magnets can help them last longer.

Magnets Attract some Materials & ObjectsObjects that can be attracted by magnets are called magnetic objects whilst those objects that cannot be attracted by magnets are called non-magnetic objects. Magnetic objects are made of iron or steel. Non-magnetic objects are made of plastic, cloth, wood, glass, rubber and gold.

Different Strengths of Magnets
The strength of magnets are different from magnet to magnet. The size of the magnets of the same type and the type of magnet does affect its strength. A strong magnet can attract more objects than a weak magnet.